Another site:
AllTop 200 most popular tests to learn English...
1) Test de niveau anglais (webmaster) 6 772 005
2) Placement test : grammar for beginners (lucile83) 5 981 423
3) A/AN (webmaster) 5 358 424
4) Auxiliary BE (webmaster) 3 220 962
5) Present continuous (webmaster) 2 994 821
6) Present simple (webmaster) 2 900 926
7) Present simple (webmaster) 2 593 461
8) Present continuous (webmaster) 2 425 706
9) Adjectives (webmaster) 2 091 488
10) A/an (anonyme) 2 011 586
11) Present perfect simple (webmaster) 1 636 294
12) Vocabulary - Placement test (bridg) 1 617 510
13) Preterite (webmaster) 1 617 474
14) Short placement test (webmaster) 1 441 886
15) Preterite (webmaster) 1 440 944
16) To be (bridg) 1 403 972
17) What time is it? (webmaster) 1 347 031
18) Present perfect (webmaster) 1 340 017
19) The alphabet in English (webmaster) 1 319 092
20) Adjectives (lucile83) 1 213 790
21) What time is it? (webmaster) 1 204 689
22) Numbers (webmaster) 1 187 403
23) 'A' ou 'An' (anonyme) 1 172 488
24) Two presents: present continuous, present simple (webmaster) 1 146 550
25) To be (bridg) 1 143 789
26) Comparatives / Superlatives (webmaster) 1 097 325
27) Numbers (webmaster) 1 068 813
28) CAN / MUST (webmaster) 1 057 203
29) THE/ A / AN / nothing (webmaster) 1 029 964
30) Comparatives (webmaster) 1 005 898
31) Family life (bridg) 999 017
32) Numbers > 100 (webmaster) 985 173
33) Future (going to/will/present continuous) (anonyme) 961 212
34) Plural (webmaster) 954 224
35) Superlatives (webmaster) 873 578
36) Adjectives (anonyme) 873 170
37) Simple present (bridg) 852 110
38) Spelled words N°1 (bridg) 848 621
39) Placement test beginners: Check your spelling (lucile83) 829 409
40) Introducing oneself (webmaster) 826 243
41) Adverbs of frequency (lucile83) 814 702
42) Family (bridg) 783 294
43) General test-End of high school / Beginning of university (webmaster) 781 363
44) Present simple (lucile83) 777 403
45) Frequency adverbs (webmaster) 776 563
46) Present BE + Ving (bridg) 763 177
47) Genitive (webmaster) 722 447
48) Family tree (anonyme) 718 165
49) Preterite: simple or continuous? (webmaster) 714 698
50) Passive form (lucile83) 711 755
51) Placement test (beginners) (lili73) 699 585
52) Past simple or present perfect (lucile83) 690 800
53) Future (webmaster) 675 025
54) 2 Preterites (webmaster) 660 240
55) Present perfect simple (bridg) 656 718
56) Preterite (webmaster) 617 910
57) List of 200 irregular verbs and audio (bridg) 614 569
58) Modals (webmaster) 611 831
59) Spelled words N°2 (bridg) 608 032
60) Height (webmaster) 605 535
61) Modals (webmaster) 602 645
62) Articles a / an / the (lucile83) 596 709
63) Plural forms (bridg) 576 145
64) Nationalities (webmaster) 573 267
65) Past continuous / Past simple (anonyme) 561 590
66) Irregular plurals (bridg) 552 396
67) Two presents: simple and continuous (webmaster) 548 588
68) Preterite (bridg) 547 769
69) Vocabulary: greeting people (here4u) 536 376
70) Superlatives (frapedur) 534 386
71) Give your opinion (bridg) 530 819
72) Adverbs of Frequency (bridg) 516 108
73) Present simple or continuous (lucile83) 507 238
74) Present perfect / preterite ? (anonyme) 505 911
75) Possessive case (anonyme) 479 615
76) Countries & nationalities (bridg) 472 331
77) 'The' or nothing? (webmaster) 470 454
78) Introducing oneself (easy) (webmaster) 470 083
79) Past tenses (bridg) 469 385
80) Passive voice (webmaster) 461 342
81) Present Simple vs. Past Simple (anonyme) 454 298
82) Questions : how to ask them (lucile83) 447 254
83) General Test II / End of high school / Beginning of universi (webmaster) 445 447
84) IN, ON, AT or TO? (webmaster) 444 029
85) Relative pronouns (webmaster) 442 999
86) Comparative of superiority (lucile83) 436 436
87) How to pronounce the final -ED? (past simple) (webmaster) 435 595
88) Relative clauses (webmaster) 422 368
89) Sounds: [h] (webmaster) 418 919
90) Comparative (anonyme) 411 577
91) A/an/Ø (bridg) 397 306
92) Future simple (lucile83) 394 829
93) Past simple (anonyme) 392 415
94) This / That / These / Those (webmaster) 391 824
95) Conditional (webmaster) 390 657
96) Passive voice (anonyme) 389 354
97) Comparing (webmaster) 387 467
98) Can / could/ may/ might (woodyrun) 378 431
99) Present perfect or past tense (anonyme) 375 500
100) Personal pronouns (anonyme) 371 015
101) Much, many, little and few (felin) 370 733
102) Some, any, no, enough, too/too much/too many (webmaster) 367 626
103) Preterite continuous (BE + -ING) (webmaster) 367 297
104) Genitive case (bridg) 366 787
105) Confusing words - Placement test (bridg) 364 248
106) Irregular verbs (webmaster) 362 723
107) Numbers from 1 to 10 (lucile83) 360 919
108) Past perfect simple, past perfect continuous (anonyme) 360 504
109) Present continuous or present simple (webmaster) 359 033
110) Present perfect or preterite? (anonyme) 354 669
111) Comparative Adjectives (bridg) 351 685
112) Simple Past : regular verbs (anonyme) 351 568
113) Who, Whom, Which, or Whose? (anonyme) 347 891
114) Past simple (video) (lucile83) 346 862
115) Past simple or past continuous (lucile83) 339 305
116) What time is it? (webmaster) 337 032
117) While / When (anonyme) 336 488
118) Modals (tinou) 335 895
119) Modal: may/might (lucile83) 333 592
120) Cardinal and ordinal numbers (anonyme) 327 993
121) Possessive adjectives and pronouns (woodyrun) 323 348
122) The superlative (anonyme) 322 790
123) How to talk about the weather (lili73) 320 819
124) Since and for (lucile83) 317 840
125) Flags (webmaster) 316 953
126) Irregular verbs (bridg) 315 310
127) Prepositions - in, on, at (anonyme) 313 688
128) Pronouns (woodyrun) 311 693
129) Tenses (anonyme) 310 691
130) Placement test 3 (webmaster) 309 926
131) Order of adjectives (webmaster) 305 895
132) Could/Couldn't (laure95) 305 345
133) Comparative (anonyme) 303 825
134) Adjectives and prepositions (lucile83) 303 725
135) Agreement Tags (webmaster) 303 479
136) Asking questions (webmaster) 302 454
137) Present perfect OR simple past? (bridg) 297 865
138) Questions in the past tense (lucile83) 296 755
139) Superlative Adjectives (bridg) 295 031
140) Uncountable nouns (webmaster) 294 936
141) Object pronouns (bridg) 293 614
142) Placement test 1 (lucile83) 292 000
143) Present simple (lucile83) 289 701
144) Prefer/rather (bridg) 288 638
145) Can/Must/Should (laure95) 288 224
146) Passive form (anonyme) 287 994
147) Must or Have to? (woodyrun) 286 244
148) Past perfect (lili73) 285 190
149) The/an/nothing (bridg) 284 518
150) To be (anonyme) 283 106
151) Vocabulary: asking and answering (here4u) 280 386
152) Can and can't (laure95) 279 076
153) Modal verbs (bridg) 276 848
154) Some / Any / no... (bridg) 269 766
155) Days of the week (bridg) 268 947
156) So / neither (anonyme) 263 955
157) Past simple (video) (lucile83) 263 205
158) Used to (bridg) 260 047
159) Past tense (anonyme) 258 767
160) Should / must (anonyme) 258 758
161) Vocabulary: on the phone (here4u) 258 652
162) Find out a quantity (webmaster) 258 325
163) Present continuous (chnawa) 257 185
164) Superlative + and adjective (lucile83) 256 462
165) Articles : a / an / the / Ø (anonyme) 254 403
166) Comparative and superlative (anonyme) 253 282
167) Numbers 1/100 (anonyme) 252 973
168) Modal can (video) (lucile83) 252 463
169) Relatives pronouns (who, which, that...) (anonyme) 247 752
170) Vocabulary: at the restaurant (here4u) 245 590
171) A few, a little, few, little (anonyme) 244 422
172) Would rather / would prefer to (anonyme) 243 877
173) Comparatives (anonyme) 243 309
174) Present continuous and the Going to form (anonyme) 242 100
175) Have something done (anonyme) 239 403
176) Should/ have to/ must (anonyme) 238 755
177) The past (webmaster) 237 548
178) Future continuous and future perfect. (felin) 237 206
179) Used to/would (woodyrun) 236 562
180) How to ask a question in English (bridg) 234 402
181) I wish, if only (felin) 233 757
182) Pluperfect (webmaster) 233 446
183) Countable or Uncountable? (webmaster) 232 679
184) Some / any (younes91) 231 007
185) Should / shouldn't (anonyme) 230 841
186) Present simple or continuous (bridg) 230 748
187) Adjectives - ing and ed (felin) 228 384
188) Hypothesis (webmaster) 227 535
189) Auxiliary BE (lucile83) 226 066
190) Articles a/an/the/0 (bridg) 225 863
191) Article The or nothing (anonyme) 225 479
192) Present perfect with Ever - never - (anonyme) 225 161
193) Present continuous OR Present simple? (bridg) 224 940
194) Must or mustn't (laure95) 223 995
195) Simple Preterite OR Preterite (BE+ing) (webmaster) 222 456
196) To / in order to / so as to / so that (irish21) 219 195
197) Present perfect (bridg) 219 076
198) What time is it ? (anonyme) 217 288
199) Comparison (komiks) 215 616
200) Indirect speech (bridg) 215 522
