Another site:
AllTop 200 most popular tests to learn English...
1) Test de niveau anglais (webmaster) 6 779 032
2) Placement test : grammar for beginners (anonyme) 5 993 278
3) A/AN (webmaster) 5 365 918
4) Auxiliary BE (webmaster) 3 224 649
5) Present continuous (webmaster) 2 999 586
6) Present simple (webmaster) 2 915 936
7) Present simple (webmaster) 2 597 914
8) Present continuous (webmaster) 2 435 306
9) Adjectives (webmaster) 2 093 824
10) A/an (anonyme) 2 015 766
11) Present perfect simple (webmaster) 1 644 236
12) Preterite (webmaster) 1 629 186
13) Vocabulary - Placement test (bridg) 1 619 406
14) Preterite (webmaster) 1 448 296
15) Short placement test (webmaster) 1 443 714
16) To be (bridg) 1 406 504
17) What time is it? (webmaster) 1 349 603
18) Present perfect (webmaster) 1 346 772
19) The alphabet in English (webmaster) 1 321 321
20) Adjectives (anonyme) 1 216 144
21) What time is it? (webmaster) 1 208 886
22) Numbers (webmaster) 1 188 676
23) 'A' ou 'An' (anonyme) 1 175 860
24) Two presents: present continuous, present simple (webmaster) 1 149 664
25) To be (bridg) 1 145 762
26) Comparatives / Superlatives (webmaster) 1 104 944
27) Numbers (webmaster) 1 070 998
28) CAN / MUST (webmaster) 1 058 825
29) THE/ A / AN / nothing (webmaster) 1 034 008
30) Comparatives (webmaster) 1 007 368
31) Family life (bridg) 1 001 027
32) Numbers > 100 (webmaster) 986 466
33) Future (going to/will/present continuous) (anonyme) 964 302
34) Plural (webmaster) 955 924
35) Superlatives (webmaster) 875 431
36) Adjectives (anonyme) 874 967
37) Simple present (bridg) 854 156
38) Spelled words N°1 (bridg) 850 337
39) Placement test beginners: Check your spelling (anonyme) 830 162
40) Introducing oneself (webmaster) 827 294
41) Adverbs of frequency (anonyme) 817 739
42) Family (bridg) 784 958
43) General test-End of high school / Beginning of university (webmaster) 782 975
44) Present simple (anonyme) 781 150
45) Frequency adverbs (webmaster) 777 887
46) Present BE + Ving (bridg) 765 293
47) Genitive (webmaster) 723 792
48) Passive form (anonyme) 723 267
49) Family tree (anonyme) 719 555
50) Preterite: simple or continuous? (webmaster) 716 976
51) Placement test (beginners) (lili73) 701 315
52) Past simple or present perfect (anonyme) 694 504
53) Future (webmaster) 676 063
54) 2 Preterites (webmaster) 662 229
55) Present perfect simple (bridg) 661 638
56) Preterite (webmaster) 620 661
57) List of 200 irregular verbs and audio (bridg) 616 225
58) Modals (webmaster) 612 816
59) Spelled words N°2 (bridg) 609 329
60) Height (webmaster) 606 399
61) Modals (webmaster) 605 794
62) Articles a / an / the (anonyme) 596 764
63) Plural forms (bridg) 577 613
64) Nationalities (webmaster) 574 373
65) Past continuous / Past simple (anonyme) 566 802
66) Irregular plurals (bridg) 553 752
67) Two presents: simple and continuous (webmaster) 549 780
68) Preterite (bridg) 549 213
69) Superlatives (frapedur) 539 254
70) Vocabulary: greeting people (here4u) 536 485
71) Give your opinion (bridg) 532 094
72) Adverbs of Frequency (bridg) 517 044
73) Present simple or continuous (anonyme) 511 530
74) Present perfect / preterite ? (anonyme) 509 930
75) Possessive case (anonyme) 480 780
76) Countries & nationalities (bridg) 473 619
77) 'The' or nothing? (webmaster) 471 312
78) Past tenses (bridg) 471 036
79) Introducing oneself (easy) (webmaster) 470 788
80) Passive voice (webmaster) 463 642
81) Present Simple vs. Past Simple (anonyme) 457 624
82) Questions : how to ask them (anonyme) 448 547
83) General Test II / End of high school / Beginning of universi (webmaster) 446 223
84) IN, ON, AT or TO? (webmaster) 445 426
85) Relative pronouns (webmaster) 444 662
86) Comparative of superiority (anonyme) 438 885
87) How to pronounce the final -ED? (past simple) (webmaster) 438 115
88) Relative clauses (webmaster) 423 418
89) Sounds: [h] (webmaster) 419 582
90) Comparative (anonyme) 413 851
91) A/an/Ø (bridg) 398 937
92) Past simple (anonyme) 397 623
93) Future simple (anonyme) 396 514
94) This / That / These / Those (webmaster) 392 620
95) Conditional (webmaster) 391 791
96) Passive voice (anonyme) 390 779
97) Comparing (webmaster) 388 097
98) Can / could/ may/ might (woodyrun) 379 582
99) Present perfect or past tense (anonyme) 377 623
100) Much, many, little and few (felin) 373 000
101) Personal pronouns (anonyme) 371 393
102) Preterite continuous (BE + -ING) (webmaster) 369 460
103) Some, any, no, enough, too/too much/too many (webmaster) 368 185
104) Genitive case (bridg) 368 170
105) Confusing words - Placement test (bridg) 364 582
106) Irregular verbs (webmaster) 363 688
107) Numbers from 1 to 10 (anonyme) 361 582
108) Past perfect simple, past perfect continuous (anonyme) 360 945
109) Present continuous or present simple (webmaster) 359 641
110) Present perfect or preterite? (anonyme) 357 081
111) Simple Past : regular verbs (anonyme) 353 236
112) Comparative Adjectives (bridg) 352 294
113) Who, Whom, Which, or Whose? (anonyme) 348 890
114) Past simple (video) (anonyme) 348 533
115) Past simple or past continuous (anonyme) 342 987
116) While / When (anonyme) 338 935
117) What time is it? (webmaster) 338 019
118) Modals (tinou) 336 620
119) Modal: may/might (anonyme) 334 252
120) Cardinal and ordinal numbers (anonyme) 328 784
121) The superlative (anonyme) 325 712
122) Possessive adjectives and pronouns (woodyrun) 324 271
123) How to talk about the weather (lili73) 320 891
124) Since and for (anonyme) 318 924
125) Flags (webmaster) 317 637
126) Irregular verbs (bridg) 316 093
127) Prepositions - in, on, at (anonyme) 314 164
128) Pronouns (woodyrun) 313 795
129) Tenses (anonyme) 312 042
130) Placement test 3 (webmaster) 310 528
131) Order of adjectives (webmaster) 306 627
132) Could/Couldn't (laure95) 305 936
133) Comparative (anonyme) 304 713
134) Agreement Tags (webmaster) 304 098
135) Adjectives and prepositions (anonyme) 304 074
136) Asking questions (webmaster) 303 144
137) Present perfect OR simple past? (bridg) 298 424
138) Questions in the past tense (anonyme) 297 618
139) Superlative Adjectives (bridg) 295 867
140) Uncountable nouns (webmaster) 295 740
141) Object pronouns (bridg) 295 060
142) Placement test 1 (anonyme) 292 846
143) Passive form (anonyme) 291 492
144) Present simple (anonyme) 291 385
145) Can/Must/Should (laure95) 289 498
146) Prefer/rather (bridg) 289 462
147) Past perfect (lili73) 288 403
148) Must or Have to? (woodyrun) 287 628
149) The/an/nothing (bridg) 285 325
150) To be (anonyme) 283 508
151) Can and can't (laure95) 281 687
152) Vocabulary: asking and answering (here4u) 280 445
153) Modal verbs (bridg) 277 324
154) Some / Any / no... (bridg) 270 587
155) Days of the week (bridg) 269 112
156) So / neither (anonyme) 264 395
157) Past simple (video) (anonyme) 263 766
158) Used to (bridg) 260 374
159) Present continuous (chnawa) 260 334
160) Should / must (anonyme) 259 711
161) Past tense (anonyme) 259 366
162) Vocabulary: on the phone (here4u) 258 737
163) Find out a quantity (webmaster) 258 574
164) Superlative + and adjective (anonyme) 257 278
165) Articles : a / an / the / Ø (anonyme) 257 071
166) Comparative and superlative (anonyme) 255 421
167) Numbers 1/100 (anonyme) 253 680
168) Modal can (video) (anonyme) 253 026
169) Comparatives (anonyme) 248 550
170) Relatives pronouns (who, which, that...) (anonyme) 247 849
171) Vocabulary: at the restaurant (here4u) 245 667
172) A few, a little, few, little (anonyme) 245 420
173) Would rather / would prefer to (anonyme) 244 285
174) Present continuous and the Going to form (anonyme) 242 664
175) Should/ have to/ must (anonyme) 240 025
176) Have something done (anonyme) 239 855
177) The past (webmaster) 237 843
178) Used to/would (woodyrun) 237 677
179) Future continuous and future perfect. (felin) 237 626
180) How to ask a question in English (bridg) 235 494
181) I wish, if only (felin) 234 095
182) Pluperfect (webmaster) 233 971
183) Countable or Uncountable? (webmaster) 233 181
184) Some / any (younes91) 232 926
185) Should / shouldn't (anonyme) 231 555
186) Present simple or continuous (bridg) 230 802
187) Adjectives - ing and ed (felin) 229 115
188) Hypothesis (webmaster) 228 166
189) Auxiliary BE (anonyme) 226 458
190) Articles a/an/the/0 (bridg) 226 300
191) Article The or nothing (anonyme) 225 979
192) Must or mustn't (laure95) 225 705
193) Present perfect with Ever - never - (anonyme) 225 572
194) Present continuous OR Present simple? (bridg) 225 467
195) Simple Preterite OR Preterite (BE+ing) (webmaster) 222 838
196) To / in order to / so as to / so that (irish21) 220 307
197) Present perfect (bridg) 219 514
198) Comparison (komiks) 218 943
199) What time is it ? (anonyme) 217 656
200) Indirect speech (bridg) 216 661
