Another site:
AllTop 200 most popular tests to learn English...
1) Test de niveau anglais (webmaster) 6 784 313
2) Placement test : grammar for beginners (anonyme) 6 002 919
3) A/AN (webmaster) 5 371 829
4) Auxiliary BE (webmaster) 3 227 447
5) Present continuous (webmaster) 3 003 542
6) Present simple (webmaster) 2 926 710
7) Present simple (webmaster) 2 601 431
8) Present continuous (webmaster) 2 441 370
9) Adjectives (webmaster) 2 095 627
10) A/an (anonyme) 2 019 115
11) Present perfect simple (webmaster) 1 651 031
12) Preterite (webmaster) 1 637 649
13) Vocabulary - Placement test (bridg) 1 621 059
14) Preterite (webmaster) 1 453 270
15) Short placement test (webmaster) 1 445 206
16) To be (bridg) 1 408 310
17) Present perfect (webmaster) 1 352 447
18) What time is it? (webmaster) 1 351 405
19) The alphabet in English (webmaster) 1 323 007
20) Adjectives (anonyme) 1 217 919
21) What time is it? (webmaster) 1 211 982
22) Numbers (webmaster) 1 189 757
23) 'A' ou 'An' (anonyme) 1 178 273
24) Two presents: present continuous, present simple (webmaster) 1 151 883
25) To be (bridg) 1 147 248
26) Comparatives / Superlatives (webmaster) 1 110 961
27) Numbers (webmaster) 1 072 587
28) CAN / MUST (webmaster) 1 060 069
29) THE/ A / AN / nothing (webmaster) 1 036 803
30) Comparatives (webmaster) 1 008 570
31) Family life (bridg) 1 002 451
32) Numbers > 100 (webmaster) 987 711
33) Future (going to/will/present continuous) (anonyme) 966 852
34) Plural (webmaster) 957 275
35) Superlatives (webmaster) 876 634
36) Adjectives (anonyme) 876 215
37) Simple present (bridg) 855 712
38) Spelled words N°1 (bridg) 851 643
39) Placement test beginners: Check your spelling (anonyme) 830 938
40) Introducing oneself (webmaster) 828 151
41) Adverbs of frequency (anonyme) 819 793
42) Family (bridg) 786 087
43) General test-End of high school / Beginning of university (webmaster) 784 183
44) Present simple (anonyme) 784 158
45) Frequency adverbs (webmaster) 779 005
46) Present BE + Ving (bridg) 767 252
47) Passive form (anonyme) 732 340
48) Genitive (webmaster) 724 644
49) Family tree (anonyme) 720 524
50) Preterite: simple or continuous? (webmaster) 718 606
51) Placement test (beginners) (lili73) 702 905
52) Past simple or present perfect (anonyme) 697 856
53) Future (webmaster) 676 896
54) Present perfect simple (bridg) 665 213
55) 2 Preterites (webmaster) 664 098
56) Preterite (webmaster) 623 040
57) List of 200 irregular verbs and audio (bridg) 617 757
58) Modals (webmaster) 613 646
59) Spelled words N°2 (bridg) 610 326
60) Modals (webmaster) 608 607
61) Height (webmaster) 607 093
62) Articles a / an / the (anonyme) 596 783
63) Plural forms (bridg) 578 808
64) Nationalities (webmaster) 575 205
65) Past continuous / Past simple (anonyme) 570 099
66) Irregular plurals (bridg) 554 814
67) Two presents: simple and continuous (webmaster) 550 635
68) Preterite (bridg) 550 294
69) Superlatives (frapedur) 542 611
70) Vocabulary: greeting people (here4u) 536 596
71) Give your opinion (bridg) 533 044
72) Adverbs of Frequency (bridg) 517 907
73) Present simple or continuous (anonyme) 513 739
74) Present perfect / preterite ? (anonyme) 512 884
75) Possessive case (anonyme) 481 517
76) Countries & nationalities (bridg) 474 526
77) Past tenses (bridg) 472 409
78) 'The' or nothing? (webmaster) 471 956
79) Introducing oneself (easy) (webmaster) 471 383
80) Passive voice (webmaster) 465 170
81) Present Simple vs. Past Simple (anonyme) 460 691
82) Questions : how to ask them (anonyme) 449 269
83) General Test II / End of high school / Beginning of universi (webmaster) 446 917
84) IN, ON, AT or TO? (webmaster) 446 592
85) Relative pronouns (webmaster) 446 307
86) Comparative of superiority (anonyme) 440 825
87) How to pronounce the final -ED? (past simple) (webmaster) 439 747
88) Relative clauses (webmaster) 424 330
89) Sounds: [h] (webmaster) 420 066
90) Comparative (anonyme) 415 508
91) Past simple (anonyme) 401 010
92) A/an/Ø (bridg) 399 885
93) Future simple (anonyme) 397 885
94) This / That / These / Those (webmaster) 393 274
95) Conditional (webmaster) 392 848
96) Passive voice (anonyme) 391 958
97) Comparing (webmaster) 388 638
98) Can / could/ may/ might (woodyrun) 380 848
99) Present perfect or past tense (anonyme) 379 434
100) Much, many, little and few (felin) 374 971
101) Personal pronouns (anonyme) 371 745
102) Preterite continuous (BE + -ING) (webmaster) 371 225
103) Genitive case (bridg) 369 122
104) Some, any, no, enough, too/too much/too many (webmaster) 368 751
105) Confusing words - Placement test (bridg) 365 000
106) Irregular verbs (webmaster) 364 645
107) Numbers from 1 to 10 (anonyme) 362 101
108) Past perfect simple, past perfect continuous (anonyme) 361 275
109) Present continuous or present simple (webmaster) 360 164
110) Present perfect or preterite? (anonyme) 359 185
111) Simple Past : regular verbs (anonyme) 354 978
112) Comparative Adjectives (bridg) 352 795
113) Who, Whom, Which, or Whose? (anonyme) 349 923
114) Past simple (video) (anonyme) 349 596
115) Past simple or past continuous (anonyme) 345 786
116) While / When (anonyme) 341 014
117) What time is it? (webmaster) 338 731
118) Modals (tinou) 337 277
119) Modal: may/might (anonyme) 334 781
120) Cardinal and ordinal numbers (anonyme) 329 325
121) The superlative (anonyme) 327 820
122) Possessive adjectives and pronouns (woodyrun) 325 052
123) How to talk about the weather (lili73) 320 976
124) Since and for (anonyme) 319 803
125) Flags (webmaster) 318 130
126) Irregular verbs (bridg) 316 784
127) Pronouns (woodyrun) 315 530
128) Prepositions - in, on, at (anonyme) 314 604
129) Tenses (anonyme) 313 069
130) Placement test 3 (webmaster) 310 993
131) Order of adjectives (webmaster) 307 136
132) Could/Couldn't (laure95) 306 792
133) Comparative (anonyme) 305 371
134) Adjectives and prepositions (anonyme) 304 574
135) Agreement Tags (webmaster) 304 561
136) Asking questions (webmaster) 303 704
137) Present perfect OR simple past? (bridg) 298 885
138) Questions in the past tense (anonyme) 298 490
139) Uncountable nouns (webmaster) 296 562
140) Superlative Adjectives (bridg) 296 460
141) Object pronouns (bridg) 296 332
142) Passive form (anonyme) 294 130
143) Placement test 1 (anonyme) 293 419
144) Present simple (anonyme) 292 254
145) Can/Must/Should (laure95) 291 520
146) Past perfect (lili73) 290 758
147) Prefer/rather (bridg) 290 163
148) Must or Have to? (woodyrun) 288 612
149) The/an/nothing (bridg) 285 882
150) To be (anonyme) 283 660
151) Can and can't (laure95) 283 140
152) Vocabulary: asking and answering (here4u) 280 501
153) Modal verbs (bridg) 277 728
154) Some / Any / no... (bridg) 275 241
155) Days of the week (bridg) 269 222
156) So / neither (anonyme) 264 632
157) Past simple (video) (anonyme) 264 209
158) Present continuous (chnawa) 262 219
159) Used to (bridg) 260 602
160) Should / must (anonyme) 260 436
161) Past tense (anonyme) 259 799
162) Vocabulary: on the phone (here4u) 258 849
163) Find out a quantity (webmaster) 258 784
164) Articles : a / an / the / Ø (anonyme) 258 732
165) Superlative + and adjective (anonyme) 257 839
166) Comparative and superlative (anonyme) 257 390
167) Numbers 1/100 (anonyme) 253 989
168) Modal can (video) (anonyme) 253 447
169) Comparatives (anonyme) 251 439
170) Relatives pronouns (who, which, that...) (anonyme) 247 898
171) A few, a little, few, little (anonyme) 246 452
172) Vocabulary: at the restaurant (here4u) 245 714
173) Would rather / would prefer to (anonyme) 244 882
174) Present continuous and the Going to form (anonyme) 243 294
175) Should/ have to/ must (anonyme) 241 228
176) Have something done (anonyme) 240 162
177) Used to/would (woodyrun) 238 408
178) The past (webmaster) 238 058
179) Future continuous and future perfect. (felin) 238 044
180) How to ask a question in English (bridg) 236 221
181) Pluperfect (webmaster) 234 531
182) I wish, if only (felin) 234 416
183) Some / any (younes91) 234 219
184) Countable or Uncountable? (webmaster) 233 884
185) Should / shouldn't (anonyme) 232 106
186) Present simple or continuous (bridg) 230 838
187) Adjectives - ing and ed (felin) 229 616
188) Hypothesis (webmaster) 228 723
189) Must or mustn't (laure95) 227 001
190) Auxiliary BE (anonyme) 226 648
191) Articles a/an/the/0 (bridg) 226 481
192) Article The or nothing (anonyme) 226 338
193) Present perfect with Ever - never - (anonyme) 226 178
194) Present continuous OR Present simple? (bridg) 225 768
195) Simple Preterite OR Preterite (BE+ing) (webmaster) 223 163
196) Comparison (komiks) 221 378
197) To / in order to / so as to / so that (irish21) 221 229
198) Present perfect (bridg) 219 848
199) Indirect speech (bridg) 218 009
200) What time is it ? (anonyme) 217 951
